Work guide or support



Sept. 15, LUBRANDT I 2,054,068

WORK GUIDE OR SUPPORT Fi d May 12, 1932 Patented Sept. 15, 1936 UNITEDSTATES PATENT OFFICE' WORK GUIDE OR SUPPORT Application May 12, 1932,Serial No. 610,922

18 Claims.

This invention relates to work guides or supports and is illustratedherein as embodied in a machine particularly adapted for forming holesin shoe bottoms. Another form of such a machine, a species under thepresent invention, is the subject of an application for Letters Patentfiled in my name in the United States Patent Office on December 30,1935, Serial No. 56,733.

In United States Letters Patent No. 1,615,258, granted January 25, 1927on application of M. V. Bresnahan there is described a method oftemporarily attaching wood heels to shoes by passing a screw fastenerthrough a hole in the rear end of a last within a shoe and through ahole in the heel-seat portion of the shoe bottom into a heel. Thissecures the last, the shoe and the heel together sothat variousoperations can be performed upon the heel or the shoe without waitingfor the heel-attaching adhesive to dry. This method has gone intoextensive use and under most conditions is satisfactory. Sometimes,however, the attaching face of the heel and the heel seat of the shoeare not held in close engagement because of the fact that the operatordid not apply sufficient preliminary clamping pressure, thus leaving aspace between the heel seat and the opposed surface of the heel. Whenthe screw fastener is inserted in such a shoe, the heel seat and theattaching face of. the heel cannot be brought into close engagementwithout considerable difiiculty, because the fastener first cuts threadsin the wall of the hole formed in the shoe bottom and then cuts threadsin the walls of the hole formedin the wood heel.

form a hole, in the shoe bottom of a larger diameter than the diameterof the screw fastener to allow sufficient clearance between the Walls ofthe hole and said fastener; Since the hole in the last bottom must be inalinement with the hole in the last, the drill used to form theclearance hole must be of a length sufficient to pass through the lastand through the shoe bottom. The long 45 drill operating at a high speedis dangerous to the operator because of the chance of injury throughaccidental contact with it. Furthermore, in order to avoid injury to theshoe and last, it is important that they be properly positioned beforemovement into co-operation with the drill or other operating tool. Anobject of this invention, therefore, is to provide means for guardingthe tool and for guiding or supporting such a work piece as a shoerelatively to said tool so that the 55 operator cannot move the workguide or support To avoid this difficulty it has been proposed to fromits inactive position until the work is positioned correctly withrespect to the tool;

In accordance with this object one feature of the invention resides inaguide or support movable by work applied to it and means releasable bythe work for locking the support against such movement. The movement ofthe guide may be into co-operation with such an operating tool as adrill, and said guide may furnish a guard for the drill. When shoes onlasts are operated upon, i the last cones may enter between oppositeguard members, first releasing-the lock and then moving the guidelongitudinally of the drill. As illustrated, the work guide is mountedon a slide which is provided with a slot or recess to receive a lockingmember, the locking member being constructed and arranged to be releasedby contact. with the work of a releasing member mounted on the support.

Other objects and features-of the invention will be explained in thefollowing description, reference being made to the accompanying drawingin which o Fig. lis a view in side elevation of a machine illustratingone embodiment-of the invention, showing the work-positioning membersand their relation to the drill prior to the hole-forming operation; and

Fig. 2 is an enlarged detail view of a part of the machine, showing thework-positioning, members and their relation to the drill at theconclusion of the hole-forming operation.

The machine therein shown has a drill I0 and a movable work guiding orpositioning support 12. The drill I0- is rigidly secured to onev end ofthe armature shaft of an electric'motor 14 by means of a chuck it whichis rigidly secured to the shaft by a set screw [8. The machine ismounted on an inclined surface of the base 20 so that the shaft of themotor is inclined down- 40 wardly to facilitate positioning a lastedshoe 22 on the work support. I

The work support I2 is slidably mounted on a bracket 24 which is securedto the base 20 by screws 26. The upper end of the bracket 24 is providedwith an opening to receive a slide 28 to one end of which the support I2is rigidly secured by a set screw 30. The slide 28. and the work supportl2 are normally maintained in the position shown in Fig. 1 by a spiralspring 32. This spring surrounds a spindle 34 mounted on the forward endof the bracket 24 and has its free end secured to the rear of the slide.A stop 36 upon the slide limits its forward movement. To reducefriction, the slide 28 rides on rolls sur- (usv rounding the spindle 34at opposite sides of the spring 32 and on the roll 38, while its uppersurface bears against rollers which are mounted in the upper portion ofthe bracket 24.

To insure that the lasted shoe is properly positioned relatively to thedrill l0 and to prevent injury to the operator, the work support i2 isprovided with forwardly extending flanges or guards 42, 44 which are soarranged that the cone of a last 46 can be placed between them. Theseguards extend beyond the end of the drill It), thus preventingengagement of the last 46 or of the shoe 22 with the drill before thelast hole has been alined with saiddrill. Between the guards the workpresents a plane'surface extending transversely of the drill. With thisthe end of the last cone may contact and thus determine the angularposition of the last with respect to the drill.

To prevent movement of the support l2 until the last 46 and the shoe 22are properly positioned, a device is provided for locking said supportnormally in its inactive position. This locking device has a releasingmember 48, which is illustrated herein as a finger, pivoted to the worksupport l2. upper end extending into the space between the two guards42, 44 by a spring 45. v The location of the finger 48 between theguards is such that it cannot inadvertently be moved to disengage thelocking device. A releasing bar 50 is connected to the finger by a pin52. The free end of the bar is arranged for engagement with a camsurface 54 formed on a locking member 56 which is pivoted at 58 to thebracket 24. The bar 50 slides in a guideway formed in the top of thebracket and rests on the rolls 40. A notch 60 is formed in the uppersurface of the slide 28 and an end portion of the locking member 56enters the notch to prevent movement of the support l2 before the finger48 has been moved rearwardly.

The manner of using the support will now be briefly described. The shoe22 on the last 46 is placed between the guards 42, 44 forming a part ofthe work guide or support l2 and its slide 28, the hole in the lastbeing guided thereby into alinement with the drill Ill. The shoe is thenmoved rearwardly until the cone of the last moves the finger 48,rearwardly, thus causing the end of the bar 50 to engage the camsurface 54 on the locking member 56. This rotates the member in acounterclockwise direction, thereby moving the end of the locking member56 out of the notch 60 in the slide 28. With the parts of the devicethus related, continued movement of the shoe will cause the work supportto be moved rearwardly. until the drill l0 passes through the shoebottom. When the pressure of the last on the support 12 is released, thesupport I2 is returned to its original position by the spring 32. Herethe end of the member 56 falls into the notch 60, thereby again lockingthe parts.

Although the invention has been illustrated and described as embodied ina machine for forming holes in shoe bottoms, the invention is notlimited thereto, but may be used for other purposes.

Having thus described my invention, what I claim as new and desire tosecure by Letters Patent of the United States is:

1. In a machine for operating upon shoes, the combination of anoperating tool, a work support movable to present work to the tool forthe operation upon it, means for normally locking the work supportpositively against such work presenting movement, and means engageableby The finger is normally held with its work upon the support fordirectly releasing the locking means simultaneously with the positioningof work upon the support.

2. A machine for operating upon shoes having, in combination, a movablework support, a slide on which said work support is mounted, meansadapted to engage the slide for normally locking the work supportagainst movement, and a releasing member engageable by a work piece uponthe support for releasing the locking means.

-3. A machine for operating upon shoes having, in combination, abracket, a slide mounted on said bracket, a work support rigidly securedto said slide, means pivotally mounted on the bracket and arranged toengage the slide for normally locking the work support against movement,and means engageable by work upon the support for releasing the lockingmeans.

4. A machine for operating upon shoes having, in combination, a movablework support, guards secured to said work support and arranged to permitthe cone of a last to be inserted between them, a lock for securing thework support against movement, and means located between the guards andadapted to be engaged by the last upon the support for releasing thelock.

5. A machine for operating upon shoes having, in combination, anoperating tool, a bracket fixed relatively to the operating tool, a worksupport arranged for movement on said bracket, means secured to thebracket and arranged normally to lock the work support against movement,and means engageable by work upon the support for releasing the lockingmeans.

6. A machine for operating upon shoes having, in combination, anoperating tool, a bracket, a slide mounted on said bracket, a worksupport rigidly secured to said slide, means pivotally mounted on thebracket and arranged to engage the slide for normally locking the worksupport against movement, and means engageable by work upon the supportfor releasing the locking means.

'7. A machine for operating upon shoes having, in combination, anoperating tool, a work support movable relatively to said tool, guardssecured to said work support and arranged to permit the cone of a lastto be inserted between them, a lock constructed and arranged to securethe work support against movement, and means located between the guardsand adapted to be engaged by the last upon the support for releasing thelock..

8. A machine for operating upon shoes having, in combination, anoperating tool, a bracket, a slide mounted on said bracket, a worksupport rigidly secured to said slide, a lock pivotally mounted on thebracket and arranged to engage the slide for normally locking the worksupport against movement, and a finger mounted on the work support andengageable by work upon the support for releasing the lock.

9. A machine for operating upon shoes having, in combination, a drill, awork support movable relatively to the drill and arranged to be movedmanually toward the drill, a lock arranged for normally holding the worksupport against movement, a pair of guards mounted on the work supportabove and below the drill and projecting beyond the end of the drillwhen the work support is in inactive position, and a releasing fingermounted below the drill and between said guards, said finger beingarranged to be engaged by the work upon the support for releasing thelock.

10. A machine for operating upon shoes having, in combination, anoperating tool, a bracket, a slide mounted on said bracket, a worksupport rigidly secured to said slideya locking member pivotally mountedon the bracket and arranged to engage the slide for normally locking thework support against movement, a releasing member engageable by workupon the support for releasing the locking means, and a spring arrangedto return the support to inoperative position.

11. A machine for operating upon shoes having, in combination, a drill,a work support movable relatively to the drill and arranged to be movedmanually toward the drill, means arranged for normally locking the worksupport against movement, a pair of guards mounted on the work supportabove and below the drill and normally projecting beyond the end of thedrill when the work support is in inactive position, a finger mountedbelow the drill and above the lower of said guards, said finger beingarranged to be engaged by the work upon the support for releasing thelocking means, and a spring secured to said support arranged to returnthe support to inoperative position.

12. In combination, a guide member movable by Work applied to it and bysuch movement directing said work for an operation upon it, and meansfor locking the guide member against such operating movement, said meansbeing releasable by the work upon its application.

13. In combination, an operating tool, a guide member for the workmovable under the influence of said work in co-operation with the tool,and locking means for the member releasable by contact of the worktherewith to permit operation of the tool upon said work.

14. In combination, a drill, a guard for the drill movable under theinfluence of the work, and

a lock for the guard, said lock being movable into and out of engagementwith the guard and released during the application of the work.

15. In a machine for forming holes in the bottoms of lasted shoes, abase, a motor fixed thereon, a drill rotatable by the motor, a slidemovable upon the base longitudinally of the drill and provided with awork support having a surface by contact of the last cone with which theslide is moved, in which surface is an opening through which the drillpasses, and guard members extending from the contact surface of thesupport at opposite sides of the drill, the outer ends of the guardmembers being separated to receive between them the cone of a last heldin the hands of the operator and arranged to guide the cone intoengagement with the contact surface of the work support.

16. In combination, a drill arranged to operate through the cone of alast, guard members extending at opposite sides of the drill andarranged to receive the last cone between them, said guard members beingsupported to move together longitudinally of the drill, a lock forpreventing such movement of the guard members, and means for releasingthe look upon entrance of the work between the guard members.

1'7. In a machine for making holes in the bottoms of shoes, a drill, acontact member surrounding the drill and movable by the work along saiddrill, and a locking member for the contact member movable under theinfluence of the work.

18. In a heel-seat drilling machine, a drill, a member mounted formovement by the work and provided with an opening through which thedrill extends, and locking means for the member releasable by contact ofthe work therewith.

FRANCIS LOW BRANDT.

